2013 Forest Service Outdoor Recreation Accessibility Guidelines (FSORAG)

Slope.

The incline of a surface. 

• Cross Slope. The difference in elevation from edge to edge of an ORAR, trail, or beach access route measured perpendicular to the direction of travel.  This may be expressed as the percentage of change in elevation or as a ratio of vertical distance to horizontal distance. The percentage is shown in parentheses in these guidelines.

• Running Slope (Grade). The difference in elevation of a section of an ORAR, trail, or beach access route measured parallel to the predominant direction of travel.  This may be expressed as a ratio of vertical distance to horizontal distance or as the percentage of change in elevation.  The percentage is shown in parentheses in these guidelines.